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Applying The CALLIB Patch (for GRPPHA/RBNPHA) To Your 6.4 Installation

First, download the callib patch installer.
Next:
- If you are patching an existing HEASoft 6.4 source code distribution, download the source code patch.
- Alternatively, if you are patching an existing HEASoft 6.4 pre-compiled binary distribution, download the tar file below appropriate for your architecture & operating system:
  
  Linux PC
  
  Linux PC 64-bit
  
  Darwin 7.x Mac PPC
  
  Darwin 8.x Mac PPC
  
  Darwin 9.x Mac PPC (currently unavailable)
  
  Darwin 8.x Mac Intel (currently unavailable)
  
  Solaris/SunOS
  
  Linux Mac PPC
  
  Cygwin PC (currently unavailable)
Finally, copy the patch installer (hdpatch.sh) and the patch file you downloaded above to the directory containing your pre-existing headas-6.4 directory. Then, simply run the installer script (using sh):
```
sh hdpatch.sh
```
If you have any questions about the information above, please write to us at the FTOOLS help desk.